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Children's Asthma Peak Flow Calculator

This calculator is for children with asthma. If you know how tall your child is, you can find out what his or her personal best peak flow value is. Peak flow is how fast your child breathes out air after taking a deep breath. Your child's peak flow tells you and your child's doctor how well your child's lungs are working.

You need to know your child's personal best peak flow number to help control your child's asthma. This number is part of your child’s Asthma Action Plan.

Changes from your child's personal best can help you see how well your child's asthma is under control. These changes also can let you know when your child needs medicine and when your child needs medical care.

If you don't know how to find your child's personal best peak flow, click here for an explanation.

Note: The calculator will only work if your child is at least 43 inches tall.

Enter your child's information

This calculator is not intended to replace the evaluation of a healthcare professional.

Online Medical Reviewer: Fraser, Marianne, MSN, RN
Online Medical Reviewer: Pierce-Smith, Daphne, RN, MSN, CCRC
Date Last Reviewed: 3/3/2016
About StayWell

Our web site is designed to provide general information to educate users about programs and services, which may be available through our hospitals. The web site is not intended to provide medical advice nor should the information be used to attempt to determine the presence, absence or severity of any illness or medical condition which may be perceived or experienced by the user of this site. If you have or suspect you may have an illness or condition which you believe requires medical attention, we recommend you call your primary care physician. If you believe you are experiencing a medical emergency please call "911" (or your local medical emergency number) or seek immediate care from the nearest hospital Emergency Department. The provision of information to users of this web site is not intended as an inducement or to otherwise influence a person's decision to order or receive any item or service from a particular provider, practitioner or supplier that is reimbursable under Medicare, a state healthcare program (e.g., AHCCS) or any other healthcare plan.

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